CN105243190B - A kind of modeling method of blast furnace material distribution process charge level output shape - Google Patents
A kind of modeling method of blast furnace material distribution process charge level output shape Download PDFInfo
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Abstract
This application discloses the modeling methods that a kind of blast furnace material distribution process charge level exports shape,Chute dip vector and cloth number of turns vector including setting burden distribution matrix,The output shape of charge level function of cloth process is set,The bottom shape exported using charge level is horizontal plane as with reference to benchmark,The integral constraint of structure output shape of charge level function,The basic function of charge level is exported by the way that individual pen cloth is arranged,To build the cloth output function of different ring positions,And determine that final charge level exports shape according to the cloth output function of last ring position,The overall picture of the entire shape of charge level of burden distribution matrix output can easily and accurately be obtained,Realize the graph visualization of the output shape of charge level of blast furnace material distribution matrix,Reduce fuel ratio,Save energy consumption,Ensure working of a furnace stable smooth operation,Blast furnace stable yields,Blast furnace is lengthened the life,Blast furnace is avoided to suppress wind,It is difficult to walk,Cave in and collapse the appearance of the failures such as material,It is advantageously implemented the DYNAMIC DISTRIBUTION control of blast furnace burden output shape or even the automation of entire blast furnace ironmaking process.
Description
Technical field
The invention belongs to blast furnace ironmaking process control fields more particularly to a kind of blast furnace material distribution process charge level to export shape
Modeling method.
Background technology
Blast furnace material distribution is a kind of operational means of distribution of the blast furnace ironmaking procedure regulation furnace charge in furnace throat, and furnace charge is in furnace throat
Burden distribution shape it is reasonable whether to blase furnace cast iron yield, the stable smooth operation of fuel consumption, prolonging campaign and the working of a furnace has pole
Big influence.Burden distribution matrix is the dependent variable of charge level output shape, refers to the rule that distributing device is followed during cloth, by
Chute angle and cloth number of turns sequence are constituted according to a certain order.The charge level output shape of blast furnace material distribution process is closed smelting ring
The data information of a distribution function rather than single-point being made of internal state parameter in border.In view of blast furnace material distribution process material
Face exports the missing that shape exports the key effect of blast furnace stable smooth operation and existing charge level shape modeling technological means,
The model that blast furnace material distribution the output of process charge level function is built from the angle of process control exports for blast furnace material distribution process charge level
It is still a problem that do not capture in blast furnace ironmaking process that the control of shape, which provides input/output model,.
Publication No. discloses one kind for the patent document of CN104133945A and establishes blast furnace material distribution control parameter to charge level
Relationship model, for describe blast furnace material distribution model, blanking process model has certain positive effect, but significant drawback is desirable
There are more material surface stock rod height detection data, and have higher requirements to the accuracy of charge level altitude information, and charge level in reality
Real time scan detection technique is also a problem.At the same time, it has ignored cloth number of rings in burden distribution matrix and shape is exported to charge level
The influence of shape, while not accounting for the integral constraint of dynamic charge level output shape under permanent batch weight.Therefore, existing detection technique is simultaneously
The scanning distributed intelligence that furnace wall obtains charge level cannot be penetrated, the output shape of blast furnace material distribution matrix leans on stock rod to detect all the time,
The overall picture of entire burden distribution shape can not be obtained, and is unfavorable for the control of cloth the output of process shape of charge level.
Invention content
The purpose of the present invention is to provide the modeling methods that a kind of blast furnace material distribution process charge level exports shape, reduce modeling
Requirement of the process to detection data reduces fuel ratio, can easily and accurately obtain the entire shape of charge level of burden distribution matrix output
Overall picture.
In order to solve the above-mentioned technical problem, the invention discloses a kind of blast furnace material distribution export shape of charge level modeling method,
It is characterised in that it includes following steps：
Step 1：Build the chute dip vector α and cloth number of turns vector κ of burden distribution matrix
α=[α1, α2..., αm]∈Rm a≤αi≤ b,
κ=[κ1, κ2..., κm]∈Nm,
A and b indicates the minimum and maximum value of chute tilt adjustable range respectively,
I indicates cloth number of rings,
M indicates the total number of rings of cloth,
kiFor the i-th ring cloth when in inclination alphaiThe number of turns of lower chute rotation,
kaFor total cloth number of turns,
RmFor set of real numbers,
NmFor natural manifold；
Step 2：According to the chute dip vector α and cloth number of turns vector κ, the output shape of charge level of cloth process is set
Algorithm is：
γ (y)=f (y, α, κ), 0≤y≤r,
0 and r indicates blast furnace center and boundary furnace wall respectively,
Y indicates chute end to the horizontal distance at blast furnace center；
Step 3：The bottom shape exported using charge level exports shape of charge level function as horizontal plane as benchmark, structure is referred to
Integral constraint
Step 4：Structure individual pen cloth charge volume be：
Vu=Va/κa；
Step 5：Be arranged individual pen cloth output charge level basic function be：
G (α) is the corresponding drop point function in cloth inclination angle, and ξ is corrected parameter, and variable σ is form parameter；
Step 6：Build the integral constraint of unit basic function
Step 7：According to the iterative solution of the form parameter σ of the integral constraint solution procedure 5 of step 6；
Step 8：First ring cloth output function is built by burden distribution matrix：
Variable σ1For the form parameter of the first ring cloth；
Step 9：Build the second ring by burden distribution matrix is to m ring cloth output functions：
Step 10：Determine that final charge level output shape is according to the cloth output function of last ring position：
Compared with prior art, the present invention has substantive distinguishing features following prominent：
Method is simple, reduces requirement of the modeling process to detection data number, and the control that shape is exported for charge level provides
Computation model, including the chute dip vector of setting burden distribution matrix and cloth number of turns vector, are arranged the output material of cloth process
Face shape function, the bottom shape exported using charge level export the product of shape of charge level function as horizontal plane as benchmark, structure is referred to
Divide constraint, the basic function of charge level is exported by the way that individual pen cloth is arranged, to build the cloth output function of different ring positions, and according to most
The cloth output function of ring position determines final charge level output shape afterwards, can easily and accurately obtain the whole of burden distribution matrix output
The overall picture of a shape of charge level realizes the graph visualization of the output shape of charge level of blast furnace material distribution matrix, reduces fuel ratio, save
It has saved energy consumption, has ensured that working of a furnace stable smooth operation, blast furnace stable yields, blast furnace are lengthened the life, blast furnace is avoided to suppress wind, be difficult to walk, cave in and collapse material etc.
The appearance of failure, be advantageously implemented blast furnace burden output shape DYNAMIC DISTRIBUTION control so that entire blast furnace ironmaking process it is automatic
Change.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and constitutes the part of the present invention, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the output shape of charge level in the blast furnace material distribution of the present invention；
Fig. 2 is the discrete angles α (i.e. the α angles of discretization) and the relativity of corresponding drop point x result of calculations of the present invention；
Fig. 3 is that the unit corresponding to the dynamic deformation parameter of the present invention exports basic function and definite value unit output basic function
Relativity figure；
Fig. 4 is that the blast furnace material distribution of the present invention exports the comparison diagram of charge level function monocycle cloth；
Fig. 5 is that the blast furnace material distribution of the present invention exports the comparison diagram of charge level function monocycle cloth and polycyclic distributing；
Fig. 6 is the comparison diagram of two polycyclic distributings of the blast furnace material distribution Output matrix charge level function of the present invention.
Specific implementation mode
The modeling method of the blast furnace material distribution process charge level output shape of the present invention, includes the following steps：
Refer to Fig. 1 to Fig. 6, blast furnace material distribution process parameter data such as following table：
| The volume V of charge batch weighta | 30m3 |
| Stream initial velocity v0 | 1.2m/s |
| Cloth period of time Ta | 75s |
| The length H of Y-piece or passagey | 1.8m |
| Collision loss coefficient η | 0.8 |
| Chute length lo | 4.0m |
| Friction coefficient μ | 0.5 |
| Gravity acceleration g | 9.8m/s2 |
| Stockline depth h | 1.0m |
| Furnace charge declines resistance Fm | 0.2mg |
| Chute rotation angle speed ω | 0.84rad/s |
| Chute inclination maximum b | 45 degree |
| Chute minimum angle-of-incidence a | 10 degree |
According to blast furnace material distribution process parameter data, by chute inclination angle in the sections a and b with 0.01 precision equivalence discretization,
The drop point x of α is calculated separately by blast furnace material distribution equation of locus, be distance of the furnace charge drop point apart from blast furnace center, α be chute inclination angle to
Amount：
V2=η v1cosα；
X=g (α)=l0sinα+xy
v0For stream initial velocity,
v1For the stream speed of the first ring cloth,
HyFor the length of passage,
v2For the stream speed of the second ring cloth,
η is collision loss coefficient,
XyFor the drop point of the chute dip vector α when the horizontal distance at chute end to blast furnace center is y,
M is the total number of rings of cloth,
v3For the stream speed of third ring cloth,
FmDecline resistance for furnace charge,
l0For chute length,
H is stockline depth.
By chute inclination angle after the sections a and b are with 0.01 precision equivalence discretization, the corresponding drop point x of α angles of discretization
The results are shown in Figure 2 for discrete data.
1 monocycle cloth example：
When monocycle cloth, m=1, the chute dip vector α and cloth number of turns vector κ for constituting burden distribution matrix are scalar shape
Formula, chute inclination angle can take the arbitrary value within the scope of chute tilt adjustable, and for the ease of simulation comparison, α takes 15,20,25,30,
35,40,45 equal 7 reduced values, cloth number of rings is determined by the cloth time cycle, due to cloth time cycle 75s, when often enclosing cloth
Between 7.5 seconds, therefore total cloth number of turns ka=10.
Provide the output shape of charge level function of monocycle cloth process
γ (y)=f (y, α, κ), 0≤y≤r,
0 and r indicates blast furnace center and boundary furnace wall respectively,
Y indicates chute end to the horizontal distance at blast furnace center；
It is assumed that γe(y) 0 ≡, the integral constraint of structure output shape of charge level function
Determine the charge volume of individual pen cloth:Vu=Va/κa=3m3,
Provide the basic function of individual pen cloth output charge level：
G (α) is calculated by cloth equation of locus, corrected parameter ξ=1；
Build the integral constraint of unit basic function：
By the iterative solution of your form parameter σ of the alternative manner corresponding to integral constraint solution of Gauss Saden；α takes 15,
Pair of the calculation by computer and definite value form parameter σ=0.2 of basic function when 20,25,30,35,40,45 equal 7 reduced values
Than as shown in Figure 3.
Since the first ring of monocycle cloth is also last ring, therefore charge level output function：
Build the constraints of charge level output function：
According to the iteration of form parameter σs of the integral constraint solution α under 15,20,25,30,35,40,45 equal 7 reduced values
Solution；
Charge level exports shape function when monocycle cloth,
γ (y)=f (y, α, κ)=γ (y, α, σ),
The comparing result of its computer simulation data is as shown in Figure 4.
The comparison example of 2 polycyclic distributing Computer Simulations and monocycle：
Monocycle charge level output function relationship has calculated, and the charge level that this link emphasis calculates polycyclic distributing exports letter
Number；
By giving burden distribution matrix α2=[44.5,39.2,37.0,33.4,29.4], κ 2=[3,4,1,1,1], it is known that m=
5, cloth number of total coils ka=3+4+1+1+1=10；
Provide the output shape of charge level function of polycyclic ring cloth process
γ (y)=f (y, α, κ), 0≤y≤r,
0 and r indicates blast furnace center and boundary furnace wall respectively,
Y indicates chute end to the horizontal distance at blast furnace center；
It is assumed that γe(y) 0 ≡, the integral constraint of structure output shape of charge level function
Determine the charge volume of individual pen cloth：Vu=Va/κa=3m3,
Provide the basic function of individual pen cloth output charge level
G (α) is calculated by cloth equation of locus, corrected parameter ξ=1；
Build the integral constraint of unit basic function
The iterative solution of corresponding form parameter σ is solved according to the integral constraint by Gauss Saden that iterative learning method；α
The calculation by computer of basic function and definite value form parameter σ=0.2 when taking 15,20,25,30,35,40,45 equal 7 reduced values
Comparison it is as shown in Figure 3.
First ring cloth output function is built by burden distribution matrix：
Variable σ1For the form parameter of the first ring cloth；
The constraints of the first ring cloth is built by burden distribution matrix：
Form parameter σ is solved according to integral constraint1Iterative solution；
Second ring to the 5th ring cloth output function is built by burden distribution matrix：
The constraints of the second ring to the 5th ring cloth is built by burden distribution matrix：
Row write the piecewise function of i rings：
Solve the iterative solution of form parameter σ i respectively according to integral constraint；
Row, which write final charge level output shape function, to be determined by the output shape of charge level function of last ring position：
The comparison knot of charge level output shape computer emulation data of the five rings cloth with monocycle cloth at chute inclination alpha=35 °
Fruit is as shown in Figure 5.
The case of 3 two polycyclic distributings comparison：
Two comparison burden distribution matrixes be respectively,
Burden distribution matrix 1：
α1=[37,34,32,28,21], κ1=[3,2,2,2,1]；
Burden distribution matrix 2：
α2=[42.5,40.0,37.5,34.5,31.5], κ2=[3,3,2,1,1]；
3.1 charge levels for calculating burden distribution matrix 1 export shape；
M=5, cloth number of total coils k known to two given burden distribution matrixesa=3+2+2+2+1=10；
Provide the output shape of charge level function of polycyclic ring cloth process
γ (y)=f (y, α, κ), 0≤y≤r,
0 and r indicates blast furnace center and boundary furnace wall respectively,
Y indicates chute end to the horizontal distance at blast furnace center；
It is assumed that γe(y) 0 ≡, the integral constraint of structure output shape of charge level function
Determine the charge volume of individual pen cloth：Vu=Va/κa=3m3,
Provide the basic function of individual pen cloth output charge level
G (α) is calculated by cloth equation of locus, corrected parameter ξ=1；
Build the integral constraint of unit basic function
By the iterative solution of your form parameter σ of the alternative manner corresponding to integral constraint solution of Gauss Saden；α takes
The calculation by computer of basic function and definite value form parameter σ=0.2 when 15,20,25,30,35,40,45 equal 7 reduced values
Comparison is as shown in Figure 3.
First ring cloth output function is built by burden distribution matrix：
Variable σ1For the form parameter of the first ring cloth；
The constraints of the first ring cloth is built by burden distribution matrix：
Form parameter σ is solved according to integral constraint1Iterative solution；
Second ring to the 5th ring cloth output function is built by burden distribution matrix：
The constraints of the second ring to the 5th ring cloth is built by burden distribution matrix：
Row write the piecewise function of i rings：
Solve form parameter σ respectively according to integral constraintiIterative solution；
Row, which write final charge level output shape function, to be determined by the output shape of charge level function of last ring position：
Comparing result such as Fig. 5 of the charge level output shape computer emulation data inputted is by the burden distribution matrix of monocycle cloth
It is shown.
3.2 calculate burden distribution matrix as α2=[42.5,40.0,37.5,34.5,31.5], κ2It is polycyclic when=[3,3,2,1,1]
The charge level of cloth exports shape；
M=5, cloth number of total coils k known to two given burden distribution matrixesa=3+3+2+1+1=10；
Provide the output shape of charge level function of polycyclic ring cloth process
γ (y)=f (y, α, κ), 0≤y≤r,
0 and r indicates blast furnace center and boundary furnace wall respectively,
Y indicates chute end to the horizontal distance at blast furnace center；
It is assumed that γe(y) 0 ≡, the integral constraint of structure output shape of charge level function
Determine the charge volume of individual pen cloth：Vu=Va/κa=3m3,
Provide the basic function of individual pen cloth output charge level：
G (α) is calculated by cloth equation of locus, corrected parameter ξ=1；
Build the integral constraint of unit basic function：
By the iterative solution of your form parameter σ of the alternative manner corresponding to integral constraint solution of Gauss Saden；α takes 15,
Pair of the calculation by computer and definite value form parameter σ=0.2 of basic function when 20,25,30,35,40,45 equal 7 reduced values
Than as shown in Figure 3.
First ring cloth output function is built by burden distribution matrix：
Variable σ1For the form parameter of the first ring cloth；
The constraints of the first ring cloth is built by burden distribution matrix：
Form parameter σ is solved according to integral constraint1Iterative solution；
Second ring to the 5th ring cloth output function is built by burden distribution matrix：
The constraints of the second ring to the 5th ring cloth is built by burden distribution matrix：
Row write the piecewise function of i rings：
Solve form parameter σ respectively according to integral constraintiIterative solution；
Row, which write final charge level output shape function, to be determined by the output shape of charge level function of last ring position：
Comparing result such as Fig. 6 of the charge level output shape computer emulation data inputted is by the burden distribution matrix of polycyclic distributing
It is shown.
Test result：The modeling method of the blast furnace material distribution process charge level output shape of the present invention reduces modeling process to inspection
The requirement of measured data realizes the output shape visualization of burden distribution matrix, is conducive to the formulation and adjustment of burden distribution system.Fuel ratio
It is a principal economic indicators of steel process, indicates often to smelt the fuel sum that one ton of iron is consumed, be to weigh a blast furnace
One important indicator of energy consumption height, certain ironworks fuel ratio in March 529.1kg, April fuel ratio 530kg, in this hair since May
Burden distribution matrix is significantly corrected and adjusted under bright technological guidance, and May, fuel ratio was 518, and energy consumption reduces by 2.2%, it will be apparent that real
Energy-saving effect is showed.This patent easily and accurately obtains the overall picture of the output shape of charge level of burden distribution matrix, realizes height
The graph visualization of the output shape of charge level of stove burden distribution matrix, for ensureing that working of a furnace stable smooth operation, blast furnace stable yields, blast furnace are lengthened the life,
The appearance for avoiding blast furnace from suppressing wind, be difficult to walk, cave in and collapse the failures such as material is advantageously implemented the dynamic point of blast furnace burden output shape
Cloth controls or even the automation of entire blast furnace ironmaking process.
Several calculated examples of the application have shown and described in above description, but as previously described, it should be understood that the application is simultaneously
It is not limited to form disclosed herein, is not to be taken as excluding other embodiments, and can be used for various other combinations, repair
Change and environment, and can in application contemplated scope described herein, by the above teachings or related fields of technology or knowledge into
Row change.And changes and modifications made by those skilled in the art do not depart from spirit and scope, then it all should be in the application
In the protection domain of appended claims.
Claims (9)
1. a kind of modeling method of blast furnace material distribution process charge level output shape, which is characterized in that include the following steps：
Step 1：Build the chute dip vector α and cloth number of turns vector κ of burden distribution matrix
α=[α1, α2..., αm]∈Rm a≤αi≤ b,
A and b indicates the minimum and maximum value of chute tilt adjustable range respectively,
I indicates cloth number of rings,
M indicates the total number of rings of cloth,
kiFor the i-th ring cloth when in inclination alphaiThe number of turns of lower chute rotation,
kaFor total cloth number of turns,
RmFor set of real numbers,
NmFor natural manifold；
Step 2：According to the chute dip vector α and cloth number of turns vector κ, the output shape of charge level algorithm of cloth process is set
For：
γ (y)=f (y, α, κ), 0≤y≤r；
0 and r indicates blast furnace center and boundary furnace wall respectively,
Y indicates chute end to the horizontal distance at blast furnace center；
Step 3：The bottom shape exported using charge level exports the integral of shape of charge level function as horizontal plane as benchmark, structure is referred to
Constraint
Step 4：Structure individual pen cloth charge volume be：
Vu=Va/κa；
Step 5：Be arranged individual pen cloth output charge level basic function be：
G (α) is the corresponding drop point function in cloth inclination angle, and ξ is corrected parameter, and variable σ is form parameter；
Step 6：Build the integral constraint of unit basic function
Step 7：According to the iterative solution of the form parameter σ of the integral constraint solution procedure 5 of step 6；
Step 8：First ring cloth output function is built by burden distribution matrix：
Variable σ1For the form parameter of the first ring cloth；
Step 9：Build the second ring by burden distribution matrix is to m ring cloth output functions：
Step 10：Determine that final charge level output shape is according to the cloth output function of last ring position：
2. the modeling method of blast furnace material distribution process charge level output shape according to claim 1, which is characterized in that the cloth
Matrix inputs for cloth process dynamics, and it is system output that charge level, which exports shape,.
3. the modeling method of blast furnace material distribution process charge level output shape according to claim 1, which is characterized in that the output
The shaped upper part of charge level is formed by volume integral with bottom shape and is kept constant with the charge volume in feed bin.
4. the modeling method of blast furnace material distribution process charge level output shape according to claim 3, which is characterized in that the shape
Using Gauss Saden, your alternative manner solves the iterative solution of parameter σ.
5. the modeling method of blast furnace material distribution process charge level output shape according to claim 3, which is characterized in that the step
8 include：
Step 8.1：By burden distribution matrix build the first ring cloth constraints be：
Step 8.2：The iterative solution of form parameter σ 1 is solved according to the integral constraint of step 8.1.
6. the modeling method of blast furnace material distribution process charge level output shape according to claim 5, which is characterized in that the step
9 include：
Step 9.1：The constraints of the i-th ring cloth is built by burden distribution matrix：
Step 9.2：Row write the piecewise function of i rings：
Step 9.3：The iterative solution of form parameter σ i is solved according to the integral constraint of step 9.1.
7. the modeling method of blast furnace material distribution process charge level output shape according to claim 3, which is characterized in that different ring positions
The superposition shape of section unit basic function and corresponding integral constraint function that is handled by drop point site of the cloth output function
At.
8. the modeling method of blast furnace material distribution process charge level output shape according to claim 7, which is characterized in that blast furnace material distribution
Process charge level output shape function is superimposed with number of turns weights by the basic function of the individual pen cloth output charge level set and is constituted.
9. the modeling method of blast furnace material distribution process charge level output shape according to claim 7, which is characterized in that the drop point
Position processing specifically includes the distance for calculating furnace charge drop point apart from blast furnace center, and α is chute dip vector：
V2=η v1cosα；
X=g (α)=l0sinα+xy；
v0For stream initial velocity,
v1For the stream speed of the first ring cloth,
G is acceleration of gravity,
HyFor the length of passage,
v2For the stream speed of the second ring cloth,
η is collision loss coefficient,
μ is friction coefficient,
ω is angular speed,
π is pi,
XyFor the drop point of the chute dip vector α when the horizontal distance at chute end to blast furnace center is y,
M is the total number of rings of cloth,
v3For the stream speed of third ring cloth,
FmDecline resistance for furnace charge,
l0For chute length,
G (α) is the corresponding drop point function in cloth inclination angle,
X is the drop point of chute dip vector α,
H is stockline depth.
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